Feed controller for record engraver carrying carriages



Aug. 10, 1948. CHANAL 2,446,526

FEED CONTROLLER FOR RECORDENGRAVER CARRYING CARRIAGES Filed 001',- 27, 1942 v 5 Sheets-Sheet 1 INVENTOB Lucien Uhaml,

ATTORNEYS.

Aug. 10, 1948. CHANAL v FEED CONTROLLER FOR RECORD ENGRA CARRYING CARRIAGES 2,446,526 VER Filed Oct. 27. 1942 5 Sheets-Sheet 2 I/vvEA ro/e cwnChaml,

f Arro/eA/EYs.

Aug. 10, 1948. L. cHAN'L'AL FEED CONTROLLER FOR RECORD ENGRAVER CARRYING CARRIAGES -5 Sheiis-Sheet, 5'

Filed Oct. 27, 1942 Lucien,

Arroe/vsns.

Aug. 10, 1948. CHANAL Filed Oct. 27, 1942 5 Sheets-Sheet 4 v I IINVENTO/E Lucien Ghana/Z, E 8) ,fl If ,7

A T TOBNEKS.

| CHANAL 2,446,526

FEED CONTROLLER FOR RECORD ENGRAVER CARRYING CARRIAGES 5 Sheets-Sheet 5 flrroglvEvs.

FilEd Q01). 27, 1942 Patented Aug. 10, 1948 UN I T E D PAT-E N T OFF I CE 2,446,526 FEED ooN'rRoLLER Fort Receipts- GRAVER CARRYING CARRIAGES LucienChaiiaLjiiimiecy, ll raiice; vested in the "Attorney General of the United States Applicationj octoberfl, 1942-, swarm). 463,551

In Switzerland November 8, 1941 s cams. (oi-274413) This invention relates to an improved feedeontroller for record engraver-carrying carriages adapted to fulfil the requirements laid down for the mechanical registration records and to satisfy the most up-todateneeds so far as automatism and safety'factorsare'coricerned in modern record broadcasting techn que.

It may be recalled that for practical'broadcasting purposes, a machine should be'adapte d to m receive records having a diameter equal. toflforty centimeters and should revolve at speeds of 'ZS and 33 /3 R. P. M. Moreover, several difier'ent pitches on the spiral furrow must be utilisable depending upon the length of the record and'the characteristics of the material of which it ismade. Furthermore, as common recordings often exceed the registration capacity of one face of the record and all emitting stations now use the so-cIal led differential system for record reading, means I o must be provided to enable an index furrow spaced from the other furrows tobeproduced during registration. Such index furrowl is obtained by momentarily increasing the tool carriage feed and isgenerally called synchronizfa- .2

tion furrow. As the registration draws toits close, the last furrow should be moved off-previous furrows and should be closed up so, that while the pick up device continues'to'b'e guided,

of soundtracks on it cannot sweep thecenter ofthe record and produce an undue rattle. II I I II I Registering machines have already been proposed to enable these manipulations tobeefiected manually but they obviouslycall for specialslgill on the part of'the operator who must therefore have been trained therefor during aconsiderable time. Moreover, no matterhow skilful theoerator may be, accuracy of movementsis limited by precision in human reflexes'and which depends upon the physical condition of I tor. Apart from that, assynchronization must be properly indexed on both operating machines, the latter must be simultaneously accessible to th operator, therebyconsiderably curtailing the possible arrangements of the appliances in a registering studio. I II I II r I II An object of. t r e t .i v n ion is, t bifovide a new or improved feed controller forreco'rd engraver-carrying carriages used in soundtrack registering machines obviatin' advantages andfurni h n' a11 'free dom, for the selection of sites or locationsascribed'to the nia- Another objectof the invention is to provide an imprqved c r lle a afo esaid'wh iinlifie .I means ensuring the-feeding or traversing motion rows;

tnelrpr cinfg dis- '2 I of r the record engraver -carryinjg' carriage is actuated' through'a' pair of free wheel devices operated int'urnirom the record carrier drive, one of said devices being associated with a primary gear such as a change: speed gear whilejthe'other'device is associated with a secondary gear adaptedfor a quic k e r feed and capable of being temporarily se't into'rotation" selectively throu a clutch, the operation of said clutch being controllable from ajdistance to suit requirements thro'ughouttlrie ec rd n p o ther ob t t e i v on is'to pr -Yidean improved controller'as aforesaid wherein the whole cycle of: motions required for the formatio'n of an index or synchronization furrow as well as the motion required for clo'si'ngup the furrow at the end of the recordare'autd- 'r'xiatically 1 controlled, thereby obviating fany manual handling which would require special skill and any risk of a record being damaged by unclev'er manipulation on the'partof a clumsy a r A still furtherpbject of the invention is to'proffvldefan imprQve d' controller as .faforesaid incorporatingsafety meari'sf so that where the operator inadvertently forgets toswitch ofi the motor "whenthesoundtrack or furrow reachesthe centra l region of the recordbeing registered, the carriage feeder holding solenoid is automatically fswitcliedfloffand the engraver is brought to incperati'vefpos'ition. I I p I I With these and'such other objects in 'VieW as will incidentally appeariher'eafter, the invention cpmprisjes the novel 'cbnstruction, combination and'arrarigem'ent of parts that will now be. described with ef erence to the accompanying diagrammatic drawings showing a convenient embodiin'entof the same and forming a part of the present disclosure.

'nl h a i 'sa- -.,'IF e. r lis a q u ne fragmentary ta SQQ IQ lE W of e. c rr a ed me h s 'anuth changefspeed' gearing therefor, said view beingtalien on the 1 ine I-', I' of Figures 2 and 9 looking in the direction of the arrows Figur Z' i s1afragmentarysectional view on the l ine' II AII of F 'i gure lQcertai'n' of the partsbeing omitted "and showin the "general arrangement of 'sh'aftsjl, 5, zs and az; v I I I I Figuregii'isj'aviewsimilar to Figure 2 taken'on 'tlie' ir ie 111 5111 of Figure l 'showing in addition n 9 Q SW F I IdFUm K.

. i ura sials t qi a w IQhQ h fin 'IVT of'Z Figuie 6 looking direction'of'the'arin the Figure 5 is a sectional view on the line V-V of Figure 6 looking in the direction of the arrows;

Figure 6 is a fragmentary sectional view on the zigzag line VI-VI of Figure 4: and line VI-VI of Figure 9, the upper gears bein shown in elevation;

Figure "I is a horizontal sectional viewthrough a series of drum switches and taken on the line VII--VII of Figure 4.

for the sake of clearness. Figure 10 is a fragmentary sectional newts the line X-X of Fig. the arrows.

Figures 11 and 12 are on the lines XI-XI and 463,572, filed Oct. 27, 1942, noW'abandonedQand will not be described in detail in t present. specification. i

The record-carrying platform fit is operatively connected witha wor njlils through gear. 105

secured tothe axisililj An annular worm wheel [I lmeshing with saidwoim communicates the motion of the platform N38 to a'change speed gear through a flexible shaft H2 having its end fixed to astub shaft j The transmissionratio is so reckoned asto causethe shaft l to revolve at the same angularspeed as the platform I68. The

shaft i hasi rigiglly secured thereto a pinion 2 spindle 3.whichis,hollow over a portion, of its st g o.ac mmodate. a p unger carrying .a transmitting finger 5. The axial movements of said plunger are derived from an annularfworm heel 1 meshing witha Worm 8 rigidly carried by the plunger 5. The wormwheell is fast upon a, shaft 9 fitted with a manuallyoperated pitchvarying hand wheel 9? (Fig. 9). The transmitting fingerfi projects sidewise from the tubular spindle 4 through a port l0 therein. Opposite said port are provided for idle. rotation four pinions ll, l2, l3, M respectively formed with grooves l5, l6, l1, 18 adapted selectivelyfto receive the upper portion of the transmitting finger 8 which projects through the port [9. Finger 5 ismounted at itsleft end on plunger '5 and is resilient so that when the plunger is moved axially the end of finger 6 may be pushed back into spindle 4 by the spacers between gears J l, l2, l3 and M. Thus finger Gis disengaged from one gear and moves past the spacer .and' thence projects again throughportlil, for engagement in the groove in the next 'gear.. Eachof the pinions ll, l2, l3,'l forming thefprimarygear meshes meshin with a spurwheelB rigidly fixed to a with one of four spur wheels 19, 2d, 21', 22 loosely mounted. for idle rotation on a spindle 23 and interconnected by countersunk dowels 99 (shown 9 looking in the direction. bfl

detail sectional views XIII-XII of Figure l, respectively, showing the wedging feathers con- 0. Figure 8 is a wiring diagram showing the electrical connections for the clutch actuator. Figure 9 is a top plan view of the entire-apparatus, assuming certain parts to be ,broken away t 4 in broken lines). The four spur wheels [9, 28, 2!, 22 drive the shaft 23 through a cushioning unit comprising dowels 24 tightly fitted in plastic material blocks 25 housed in corresponding recesses in the spur wheel l9. Such dowels engage into a free wheel ring 26 which drives the shaft 23 through wedging feathers 21 and a bushing 28 fast upon said shaft.

Such feathers enable the shaft 23 to be driven by the free wheel ring 26 while preventing the same from being driven by the shaft 23.

"As shown in Figs. 1 and 2, the end of the shaft [has keyed thereto a pinion 3Q meshing with a companion pinion 3| fast upon a pin 32 which, through aima'gnetic clutch, drives a spur wheel 34 meshing wane pinion 35 and a gear 36 (here- "loosely mounted on the shaft nected to a contact after'calledthe secondary gear). Pinion 35 i 23 drives the latter-through cushioning means comprising dowels 3Thaving a tight fit in plastic material blocks housed in recesses in the pinion 35. Such dowels 31 are in engagement with a free wheel ring 38.

The drive of the shaft 23 takes place owing to the welding effect of feathers 39 on the bushing 28 rigid upon said shaft 23. Such feathers 39 are so arranged that the pinion 35 can drive the shaft 23 when both elements of the clutch 33 are in inter-engagement and that, conversely, the pinion 35 cannot be driven by the shaft 23.

As shown in Fig. 6, the above-stated magnetic clutch is made up of two parts, one of which (40) turns with the spur wheel 34, while the other one (33) isrigid with the pin 32 operated by the stub shaft I through gears 30. and BI, An electromagnet having its winding 42 coiled around the pin 32 controls the axial movement of part 48. When winding 42 is deenergized part 40 is held in the position shown by springs, one of which is shown, nested in recesses in gear 34.

Upon theenergization of coil 42, part 50 is slid clutch is engaged and the gear 34 is driven with pin 32., Said winding 32 is fed by an auxiliary source of electricity (not shown) and has one of its terminals earthed and its other terminal conblade M bearing against the end of the pin 32. V v

The driving device for controlling the feed of the carriage H8 and the movements of the sound track engraver Iii comprises the following elements:

f 1." Electric switches I, K, L, M (Fig. '7)

imutually' interconnected electrically speaking 55 and fitted on a common shaft operatively connected to the movable element 33 of the clutch and consequently to the carriage feeding worm. 2. A relay A of the telephone type.

"3. A pair of relays B, C of the telephone type having wiper contacts. Q

4. Control switches S, F, G, V, R.

w 5. A pair of electromagnets E, D (see also Fig. 9 adapted to respectiveiy hold in operative position a nut H5 engaging a feed worm H6 which controls the motions of the carriage H8 and an engraver H1; the latter is described in detail in my co-pending application Serial No. 463,573,

'file d October 27, 1942. V

" I A. limit switch P for the carriage.

,7. Apairiof safety switches U, T. 8. An auxiliary source of electric current (not shown) tapped at n and m (Fig. 8).

As shown, the relay A has a winding 11 and a twin blade reversing switch 45, 46 whose blades respectively come into contact either with conare-ch26 5 limbs 4 orvelse w ontacts 4.8; 41 depend ng upon whether the winding is energized or deenergized.

Likewise,-the relay B-has awindin-g b and a reversing switch comprisingthree blades 5!, 52, 53 which respectively come into contacteither with contacts 58, 51, 59 or else with contacts 55,, 54, 56 depending upon whether the windingb of the relay is energized or deenergized.

Likewise again -the relay C has a pair ofgwindings c 0 and a reversing switch .includinga pair of blades Gil, 6| which respectively. come into cone tact either with contacts 62. 63 orelse with contacts 64,55 depending upon whether the .windings are energized or deenergized.

The revoluble switches are each constituted :by a wiper contact 15, TI, 18,119, 89 and a camiifi, 61, 68,-69, '10 made of an insulating material covered over a portion of its peripheryby ametal blade 1|, i2, 13, l4, 15. All metal blades'll to Hi inclusive are electrically connected to eachother and thence by the wiper contact 80 through-the blade '15 to one pole (n) of an auxiliary source of electricity.

The switch U is a two position single switch. It comprises a blade 8! electrically connectedsto the electromagnet D, anda contact stud 82; electrically connected to said auxiliary source by being properly earthed.

The switch-T is a two position two pole switch. It comprises a pair of blades 83, 86 and a pair of contacts 85, 86. Said switch T is controlled by the double electromagnet E which simultaneously actuates the nut I I5 through the mediumpf a lever H9 pivoted at I29 upon the adjacent part of the carriage and subjected to the action of a spring l2! which tends to remove the nut H5 from the worm i it. The nut H5 controls the feedof the carriage i it to which the engraver H? is secured. To that efi'ect,the dove-tail portion of carriage i is projects through a port i2 2; in the carriage, and is slidably received in a groove I23 formed in the machine frame ILBa. Itv will be seen that the nut i [5 is removed from the worm i l6 by the spring l2! as soon as the electromagnet E ceases to be energized, said spring simultaneously opening the switch T.

The switch U is controlled in a similar way.

As will be understood from the foregoing, both switches T, U are manually closed While they are automatically opened bymeans of a mechanically operating device when the electromagnets D, E are respectively deenergized, such as by the springs 84' and Si" shown in Figure'8.

The control switches S, F, R, V, C comprise press buttons among which those referenced by S, F and R are for closing purposes while those referenced by V, G are for opening purposes.

The operation of the entire device takes place as follows and will be set forth under successive headings:

Starting of device The motor i 50 which is adapted to actuate the record-carrying platform I 08 is first switched on. Then shortly before the outset of the sound track registration, the safety switch T is manually closed. This energizes the double electromagnet E (through n, 5!, V, P, 83, 85'and m) and enables the nut H5 on the carriage H8 to be brought into engagement with the feed worm H6. As the registration begins, the safety switch U is closedand the engraver H1 is laid upon the record (not shown) carried by the platform I08. As the electromagnet D is then energized through;

h -.'8.51 G. .8 a, :82 :and m, it zholdsgdown the en raver in. operative pos tion, whereupon the re istration of 7121 sound track takes place norm ll t It will be; seen-w that owing to the provision of the, safety switches T; 'U, {it is uite impossible to perform unskilful manipulation when starting ;a sound track ;reg-istration and toqscratch or otherwise; hurt; thereoold. Thus for. exampl t e engraver-cannot be laid .uponthe. {record if the carriage nut is not in engagement with the worm.

Making of-mdem orsgnchronization grooves or furrows When t ion ratorewants an indexing. groove orsynchmnizingfurrow to be produced, itls only s fi' oient for him :to operate the press button Sto-closethe circuit. The closure, of the, circuit energizes. the .Wirlding 42 of the magnetic clutch th qushinr 5, .8 ,i5dfi2i' l. a d m) W ose elements are thus= ;i nt,erwedged. From; now. on, therstubrshaft; l drivestheshait 23: through the pinions; 30 31,, the spur wheels 34, 35, the elastic col -filin 35,, 31, the free-wheelring 138 and the feathers 39 which thenycome into wedging rela- 111 w lhe bushin 13.. Which, as 1 aforesaid, is i d W h thoshfltil. These .pinions. andspur wheelsare so provided thattheshaft 23 :should revolve-about four-times faster. than when it is actuatedby the minions-1|, i2; 13,;Hi. Asia result of-this, the engraver-carryingcarriage is also fed four timesfaster and ,theresultant furrow .or soundt a k also. has a hi h r pitch- As the spurwheel r34-;meshes :with the gear the revoluble sw tches H, ;I,. K,L,' Mare rotatably driven. The. 1 11 120115331, 3E1, 34,;35 areso selected as ;to ,-;c allse;the rotaryspeed of the switches to be equal to -thatof- -the, rdcord carrying platform IQ8,w-hereby-to one full revolution of said .platform .correspondsa full revolution of the switches Hi Ll M Shortly after the... beginning .of this rotary mo tion, the wiper contact 78, ofthe switch K rides overthe cam bladelt. ,As said, blade is connected to the source of electrical .current via the switch K and as the wipercontact 18 is connected to the contact, :theswitch shunts thepress button S. This results in themagnetic. clutch remaining engaged even if jtheoperator releases the button S TIZhenyastherotation of the switchescontinues, the wipercontitct'lfi of the switch I rides over the cam blade 14,. Thelattenis connected to the source of current through the switch H, while the wiper contact. is connected to one end vof the winding aof. the. relay .Agwhoseotherend is directly,,connected.t.o.said source by proper earthing. Thereforerthe relay A is energized and actuates the two pole switch 65,- 38. From that momentnmthepress button S is connected via the bladedito. thecontact 5!! which is connected to thcwipmcontaot Hand is accordingly switched 01f. Consequentlyvthe clutch :remains. energized untilthe .switchesresumetheirinoperative position. Thistakes place aftera full revolution of the. latter. In fact, after; a full revolution. of the switches K, I, thewiperzcontacts i8, is respectivelymoveoif theircamblade l3, Mso that the relay-A,isideenergizedlas well asv the Winding 42 of the magnetic iolutch. At :that moment, the whole deyicecomes tola standstill in the original position, 1 the -clut ch. being disengaged and the shaft- 23'is again operated through the pinions I I I 2; :l 3, 4;forming-the primaryor change speed scan As the switchesHrJ. Ka v ve at h 58431 s eed.astherenordecarrying platform I08, it will be found that the engraver has out only one synchronization furrow of higher pitch.

Where it is desired to produce two synchronization furrows one after the other, it is only sufficient to press the button R shortly after reaching the end of the first furrow and to hold it in this position during a fraction of revolution of the platform, 1. e. during a short period of time Just suflicient to enable the wiper contact 18 to again come into engagement with the metal blade I3.

End of record registration The end of the record registration is controlled by operating the press button F to close the circuit. When pressing upon the button F, the winding b of the relay B and the winding of the relay C which are connected in parallel are energized through the blade 46 and the contact 11 of the relay A. The relay B is then positioned with its armature engaging the core of the relay coil or stuck and operates the three pole reversing switch i, 52, 53 while the relay C operates the two pole reversing switch 60, BI. Consequently the wiper contact 1'! of the revoluble switch L is connected to the contact 41 via the contacts 59 and 53. As said wiper l! is in contact with the cam blade 12 and as this blade is connected with the source of current, through the switch K, the press button F is shunted by the switch L. Therefore the operator can release the button F without any risk. Moreover, the blade 52 is now in contact with the contact 51 so that the winding 42 of the clutch is directly fed. The clutch being operative, an increased pitch furrow is cut in the record, as above stated, while the switches are set into revolution. Furthermore, the carriage nut holding electromagnet E which was fed via 55, 5|, V and P is now fed via H, 11,16, 58, 5|, V and P but as the relay B has a wiping contact no interruption of current takes place at E. As the relay 0 is now stuck, the winding 0 is fed through the contacts BI and 65 while the engraver holding electromagnet D which was fed through the contacts 60 and 62 is now fed through the contact 68.

It will be noticed that as the relays B and C belong to the wiper contact type, all the reverses occur without break in current feed so that the electromagnets E and D constantly remain energized. Consequently the engraver remains applied on the record and the carriage continues its motion.

After slightly less than a revolution of the switches, the wiper contact 15 moves off the cam blade ll so that the switch M cuts off the current feed to the electromagnet E. Under the influence of the spring Hi, the carriage nut is then disengaged from the 'worm'and opens the safety switch T. The engraver carriage is thus brought to a standstill and henceforward the engraver cuts a circumference into the record. The wiper contact ll of the switch L moves off the cam blade 72 and cuts off the winding b of the relay B. The three pole reversing switch then resumes its original position but the winding 42 of the magnetic clutch is still fed through the wiper contact I8 and the cam blade 13 which at that time are already in mutual contact. However, the current feed to the winding c of the relay C is cut off but the relay 0 remains stuck since its winding 0 is connected in parallel upon the clutch winding 42 beyond the switch K.

After a second full revolution of the switches, the wiper contact 18 moves off the cam blade 13 and cuts off the current from the clutch winding 42 and also from the electromagnet D connected in parallel thereto. The whole switch assembly H, I, K, L, M is arrested in the original position, and as the electromagnet D is no longer energized it allows a lifting back motion of the engraver under the influence of its return spring 95 and thus opens the safety switch U. In Figure 13 is shown the magnet D which when energized holds down the armature 96 against the action of the spring 95. Armature 95 when released by the magnet D turns in a counter-clockwise direction about its pivot 91 and its inner end tilts the pivoted engraver support 98 in a clockwise direction, thereby lifting the engraver ill from the record. A closed furrow is then defined and the engraver is lifted off.

It will be seen that the whole cycle of motions which is necessary for the formation or cutting of a synchronization furrow and of a record end furrow is automatically controlled. Therefore there is no need to exercise any manual skill or special tricks to bring about such motions while any risk of a record being detrimentally affected by lack of skill on the part of the operator is precluded. Furthermore, the two machines which require to be synchronized may not be simultaneously located within easy reach of the operator.

Where, moreover, the operator forgets to perform control for the record end, it will be seen in Fig. 9 that as soon as the carriage reaches the center of the record it energizes switch P and causes the switch P to be opened. Said switch r cuts off the current which was feeding the electromagnet E that held the carriage nut so that the carriage is brought to a standstill. Disengagement of the carriage nut opens the safety switch T which cuts off the electromagnet D which so far held the engraver. The latter is then lifted and opens the safety switch U.

Where this is required, the press button G permits the engraver to be lifted off the record in the course of a sound track registering process without requiring stoppage of the carriage while the press button V connected in series with the switch 1? permits the carriage feed to be stopped and the engraver to be lifted oif the record at each desired moment.

Minor constructional details might be altered in the general structure of the device without sacrificing its advantages or departing from the scope of the subjoined claims.

What is claimed is: Y

1. A sound track registering machine, havln a controller for the feeder of the carriage carrying the engraver for the record, supported on a rotating platform, driving means common and operatively connected to both, said platform and said feeder, characterized in that the controller is automatically operable and comprises in combination, a pair of free wheel devices adapted to be driven by said driving means and selectively connected to said carriage feeder, a primary gear for coupling said driving means to said feeder through one of said free wheel devices, a secondary gear for coupling said driving means to the feeder through the other free wheel device, the two gears having a different gearing ratio, a clutch associated with the gears, and means for operating the clutch and changing over the drive from one gear to the other to vary the feed rate.

2. A sound track registering machine, having a controller for the feeder of the carriage carrying the engraver for the record, supported on a rotating platform, driving means common", and operatively connected to both said platform and said feeder, characterized in that the controller is automatically operable and comprises in combination, a pair of free wheel devices adapted to be driven by said driving means and selectively connected to said carriage feeder, a primary gear including differently sized pinions for coupling said driving means to the feeder through one of said free wheel devices, a secondary gear for coupling said driving means to the feeder through the other free Wheel device, the secondary gear having aratio higher than any of the primary gear pinions, a clutch associated with the gears, and means for operating the clutch and changing over the drive from one gear to the'other so as to vary the feed rate.

3. A sound track registering machine, having a controller for the feeder of the carriage carrying the engraver for the record, supported on a rotating platform, driving means'common and operatively connected to both, said platform and said feeder, characterized in that the controller is automatically operable and comprises in combination, a pair of free wheel devices adapted to be driven by said driving means and selectively connected to said carriage feeder, a change speed gear for coupling said driving means to the feeder through one of said free wheel devices, a high ratio gear for coupling said driving means to the feeder through the other free wheel device, a magnetic clutch associated with the gears, manually operable control means for setting the change speed gear, and electrical switch and relay means for the remote control of the clutch and the change over of the drive from one gear to the other so as to alter the rate of feed.

4. A sound track registering machine, having a controller for the feeder of the carriage carrying the engraver for the record, supported on a rotating platform, driving means common and operatively connected to both said platform and said feeder, characterized in that the controller is automatically operable and comprises in combination, a pair of free wheel devices adapted to be driven by said driving means and selectively connected to said carriage feeder, a change speed gear for coupling said driving means with different gearing ratios to the feeder through one of said free wheel devices, a high ratio gear for coupling said driving means to the feeder through the other free wheel device, a magnetic clutch associated with the gears, manually operable control means for setting the change speed gear, electrical switch and relay means for the remote control of the clutch and th change over of the drive from one gear to the other so as to alter the rate of feed, electromagnetic means operating the engraver carriage feeder, and switch means for energizing said electromagnetic means during different periods for the generation of index grooves and end grooves on records.

5. A sound track registering machine, having a controller for the feeder of the carriage carrying the engraver for the record, supported on a rotating platform, driving means common and operatively connected to both, said platform and said feeder, characterized in that the controller is automatically operable and comprises in combination, a pair of free wheel devices adapted to be driven by said driving means and selectively connected to said carriage feeder, a change speed gear for coupling said driving means with different gearing ratios to the feeder through one of said free wheel devices, a high ratio gear for cou- '10 pling said drivingmeans to the feeder through the other free wheel device, amagnetic clutch associated with the, gears, manually operable control means for setting the changespeed gear, electrical switch and relay means for the remote control of the clutch and the change over of the drive from one gear to the other so as to alterthe rate of feed, electromagnetic means holding down the engraver carriage feeder in operativ condition,

switch means for energizing said electromagnetic means during Jdifiere'nt periods, and safety means for automatically lifting the engraver off the record on completion of the sound track registration. I

5. A sound trackregistering machine, having a controller for the feeder of the carriage carrying the engraver for the record, supported on a rotatplatform, driving means common and operatively connected to both, said'platform and said feeder, characterized in that the controller is automatically operableand comprises in combination, a pair of free wheel'devices adapted to be driven by said driving means and selectively connected to said carriage feeder, a change speed gear for coupling said driving means with different gearing ratios to the feeder through one of said free wheel devices, a high ratio gear for coupling said driving means to the feeder through the other free wheel device, a magnetic clutch associated with the gears, manually operable control means for setting the change speed gear, electrical switch and relay means for the remote control of the clutch and the change over of the drive from one gear to the other so as to alter the rate of feed, electromagnetic means holding down the engraver carriage feeder in operative condition, switch means for energizing said electromagnetic means during different periods, safety means for automatically lifting the engraver off the record on completion of the sound track registration, and further safety means co-related with the carriage feeder and said electromagnetic means to disengage the engraver from the record responsive to hindrances against suitable registration.

7. A sound track registering machine, having a controller for the feeder of the carriage carrying the engraver for the record, supported on a rotating platform, driving means common and operatively connected to both, said platform and feeder, characterized in that the controller is automatically operable and comprises in combination, a pair of free wheel devices adapted to be driven by said driving means and selectively connected to said carriage feeder, a change speed gear for coupling said driving means with different gearing ratios to the feeder through one of said free wheel devices, a high ratio gear for coupling said driving means to the feeder through the other free wheel device, a magnetic clutch associated with the gears, manually operable control means for setting the change speed gear, electrical switch and relay means for the remote control of the clutch and the change over of the drive from one gear to the other so as to alter the rate of carriage feed, electromagnetic means holding down the engraver carriage feeder in operative condition, switch means for energizing said electromagnetic means during different periods, safety means for automatically lifting th engraver off the record on completion of the sound track registration, and further safety means corelated with the carriage feeder and electromagnetic means to disengage the engraver from the record responsive to hindrances against suitable registration, said last-named safety means in- 11' eluding a switch connected across said electromagnetic means and operated by disengagement of said carriage from said carriage feeder.

8. A sound track registering machine, having a controller for the feeder of the carriage carrying the engraver for th record, supported on a rotating platform, driving means common and operatively connected to both, said platform and said feeder, characterized in that the controller is automatically operable and comprises in combination, a pair of free wheel units operating the worm, a primary gear including a line of difierently sized pinions girdling said shaft, intermeshing pinions loose on a spindle having a manually shiftable transmitter selectively engageable with the last-named pinions to change the gearing ratio, a secondary gear adjacent the other free wheel ring having a gearing ratio higher than that of any of the primary gear pinions, said rings being secured to elastic members in recesses of the adjacent pinions, a magnetic clutch associated with the gears, and electrical switch and relay means permitting remote control of the clutch and change over of the drive from one gear to the other so as to alter the rate of engraver carriage feed by said feeder.

LUCIEN CHANAL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

